Home / 21,609.64-29,825.58-13,647.88

Finding the Fourth Proportional to 21,609.64, 29,825.58 and 13,647.88

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Solution

The fourth proportional to 21,609.64, 29,825.58 and 13,647.88 is: 18,836.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,609.64 : 29,825.58 = 13,647.88 : x
  2. Step 2: Convert to fraction form
    21,609.64/29,825.58 = 13,647.88/x
  3. Step 3: Cross multiply
    21,609.64x = 29,825.58 × 13,647.88
  4. Step 4: Simplify right side
    21,609.64x = 407,055,936.77
  5. Step 5: Solve for x
    x = 407,055,936.77/21,609.64
  6. Step 6: Final answer
    x = 18,836.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.